Grammar is the foundation of clear communication. Understanding these 15 core rules will instantly eliminate 90% of spoken errors.
Rule 1: Subject-Verb Agreement
Singular subjects (he, she, it) take singular verbs with "-s/es" (He speaks). Plural subjects (they, we) take base verbs (They speak).
Rule 2: Prepositions of Time (In, On, At)
- At: Exact clock times (at 5 PM, at midnight)
- On: Days and dates (on Monday, on 15th August)
- In: Months, years, seasons, and cities (in July, in 2026, in Delhi)
